Microbial Electrosynthesis: Feeding Microbes Electricity To Convert Carbon Dioxide and Water to Multicarbon Extracellular Organic Compounds
Microbial Electrosynthesis: Feeding Microbes Electricity To Convert Carbon Dioxide and Water to Multicarbon Extracellular Organic Compounds
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DOI：
10.1128/mbio.00103-10
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发表时间：
2010-05-01
期刊：
影响因子：
6.4
通讯作者：
Lovley, Derek R.
中科院分区：
文献类型：
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作者：
Nevin, Kelly P.;Woodard, Trevor L.;Lovley, Derek R.
研究了用石墨电极将二氧化碳还原为有机化合物，为产乙酸菌Sporomusa ovata提供直接传递到细胞内的电子的可能性。卵形沙门氏菌生长在石墨阴极表面的生物膜在二氧化碳还原为乙酸酯和少量2-氧丁酸酯的过程中消耗电子。这些产品中出现的电子占消耗的电子的85%以上。这些结果表明，以二氧化碳和水为原料，以电力为能源，微生物生产多碳有机化合物是可行的。利用电力将二氧化碳还原为多碳有机化学品和燃料已被确定为一种有吸引力的策略，可以将利用光伏技术间歇收集的太阳能转化为共价化学键。然后，生产的有机化合物可以通过现有的基础设施进行分销。事实证明，二氧化碳的非生物电化学还原是有问题的。这里提出的结果表明，微生物催化剂可能是一个强大的替代品，当与光伏相结合时，电流驱动的微生物二氧化碳减少代表了一种新的光合作用形式，可能比传统的基于生物质的策略更有效地将太阳能转化为有机产品。
The possibility of providing the acetogenic microorganism Sporomusa ovata with electrons delivered directly to the cells with a graphite electrode for the reduction of carbon dioxide to organic compounds was investigated. Biofilms of S. ovata growing on graphite cathode surfaces consumed electrons with the reduction of carbon dioxide to acetate and small amounts of 2-oxobutyrate. Electrons appearing in these products accounted for over 85% of the electrons consumed. These results demonstrate that microbial production of multicarbon organic compounds from carbon dioxide and water with electricity as the energy source is feasible.IMPORTANCE Reducing carbon dioxide to multicarbon organic chemicals and fuels with electricity has been identified as an attractive strategy to convert solar energy that is harvested intermittently with photovoltaic technology and store it as covalent chemical bonds. The organic compounds produced can then be distributed via existing infrastructure. Nonbiological electrochemical reduction of carbon dioxide has proven problematic. The results presented here suggest that microbiological catalysts may be a robust alternative, and when coupled with photovoltaics, current-driven microbial carbon dioxide reduction represents a new form of photosynthesis that might convert solar energy to organic products more effectively than traditional biomass-based strategies.